Commands you need for tracing and making physicals network diagram
Core# show int trunk
Core# show etherchannel summary
Core# show mac address-table | i 0113Find out IP & MAC
SW# show arp
SW# show arp | i Vlan246
SW# show adjacency
SW# traceroute mac xxxx.xxxx.xxxx dest.macx.addr
SW# traceroute mac ip 192.168.32.1 192.168.32.200
SW# show mac address-table dynamic
SW# show mac address-table int Gi1/0/13
SW# show arp | i 192.168.32.200Display live syslog messages [on/off]
SW1# terminal monitor SW1# terminal no monitor
Show log
SW1# show logging SW1# show logging history
Show IP address of each interface
SW1# show ip int br SW1# show ip interface brief
Show route
SW1# show ip route
Show IP address of vlan 172
SW1# show ip int br vlan 172
Show interface description
SW1# show int desc SW1# show int desc | inc xyz
Show vlan
SW1# show vlan SW1# show vlan brief SW1# show vlan id 172
Show trunks
SW1# show interfaces trunk
Show etherchannel summary ( show trunk members)
Switch# show etherchannel summary
Show running configuration
SW1# show running-config
Show error disabled interfaces
SW1# show interfaces status err-disabled
Show which type of errors automatically recovers
SW1# show errdisable recovery
Enable autorecovery for all cause
SW1(config)# errdisable recovery cause all
What is being detected (all by default. Do not change this)
SW1# show errdisable detect
For WAN DHCP interface
duplex auto speed auto no shutdown
Troubleshoot poor network (collisions, bandwidth)
R# show platform error show interfaces switching show interfaces stats
static entry in use cannot remove
do clear ip nat trans *